fka BLACK HAWK
when going up hills on the highways i live near here in Cali i can sense an ammonia smell coming from the dashboard vents...? that's the best way i can describe the smell.
X2Ammonia? Are you sure you guys aren't referring to H2S...hydrogen sulfide "rotten egg" type stink as the platinum in the catalytic converter does it's thing? I can't think of any chemical reaction associated with an internal combustion engine that would result in ammonia odors.
The rich fuel idea sounds like other threads found elsewhere on the forum about the thermostat going bad. If I'm not mistaken, I think it starts around the 35-40k mile mark.OK I have a 2007 FJ Cruiser with 37K miles on it. I too am getting the Ammonia smell. For all the haters (seen on other posts) I am a chemist and know the distinct difference between Hydrogen Sulfide H2S and Ammonia NH3. The only wiggle room I would give on the smell not being only ammonia is that it smells very rich in fuel also. Problem has just been noticed in the last ~1000 miles.
Going uphill with rear window open (My dog loves open rear window) will burn our nostrils and water our eyes. Our poor dog even makes this sad face when it occurs. I see there is a tech bulletin on catalytic converters, want to know if there has been a definitive solution to this problem that I can fix in my garage before heading to the stealership.
I plan to change spark plugs, 02 sensor, and clean the MAF sensor. Any other items to review/replace before I get to the cats? I will report back if that has helped when that is accomplished in the next week or so.
I have seen other threads degenerate on this topic I ask nicely for solutions that address the issue. I want to fix issue not reroute exhaust to no longer smell it. Please offer suggestions.
I will post my progress as I go.
Thanks but refer to my previous. If you open up a bottle of ammonia unscented.. you have the smell. If you leave an egg out for a week or have well water in Florida you have H2S smell.
Fair enough on possible source of chemical smell, but I do not have the A/C running at that time. I can check to see if the pressure is good. I suspect it is fine as the A/C is ICE COLD, and no hose freezing is observed, common occurrence for low gas levels.If I had to guess, it could be your A/C system. I'm not sure what kind of refrigerant is used in the FJ, or if it has any odor, but if it was leaking, that could cause the smell. That is if it is not what others have suggested here.
Ignore all grammatical errors or misspellings, because I sent this from my phone.